
Method 1: Sign out and then sign in to to access your mailbox

To resolve this issue, use one of the following methods. Please sign out of your Microsoft account, then sign in to Outlook Web App with the account you use to read your We're currently signed in with a Microsoft account as, but that account can't be used with Outlook Web App. If your Microsoft account ends in the ".edu" domain extension and is managed by your university domain administrator, or if your Microsoft account was registered or is still registered in Office 365, you may see one of the following messages: Sorry, but we're having trouble signing you out" Instead, the web browser reloads the current webpage. When a user clicks Sign out, the user isn't signed out. When a user signs out of SharePoint Online, the user isn't signed out of the portal or Outlook Web App.

When a user signs out of one of the portals or signs out of Microsoft Outlook Web App, the user isn't signed out of Microsoft SharePoint Online.

For example, users may experience one of the following issues: Users experience issues when they try to sign out of Office 365, Microsoft Intune, or Microsoft Azure in a web browser. For more information about this change, read this blog post. Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise.
